Window wiper



Se# 11, 1934 P. s-T. J. HILTON 1,973,071

WINDOW wIPER v Filed April 16, 1932 TDR P. su. HxLTON /f/ TTD/KNEW Patented Sept. 11, 1934 UNITED STATES PATENT volfrlcE Vlmao- 11 WINDOW WIPER Philip st. John Hilton, Portland, ong.

Application April 16,

1932, serial No. suesse 2 Claims. v(Cl. 15--255) vide a window wiper of the type referred to which is simple to manufacture, easy to installfand rei -12 'and the shaft 16 is a' spring 22 whose purquires only a minimum amount of effort-on the part of the motorman to place saine irloperation.

The second object is to so constructthe device that the wiper may be brought into engagement with the glass when the window is raised or can be moved out of engagement therewith before the window lis lowered. Y

These, and other objects, will become more ap.

parent from the specification following as illustreted in the accompanying drawing, in which:

Fig. l is a vertical section through the motorznans window of a Streetcar showing the device in elevation with a portion thereof broken away in vertical section and showing the wiper out of engagement withtheglass. 1 f

Fig. 2 is a'v fragmentary Vhorizontal lsection through the device? taken l'along the line 2-2 in Fig. 1 showing the wiperin' engagement with the glass. 5

Fig. 3 is a front elevationrofthe device from the exterior oi the'carvwlndow.

Fig. 4 is a section taken along henne 4'. fin

riga. Y

Fig. ,5 is a. sectionvtaken along the line 5--5 in Fig. 2.

Fig. 6 is a. section vtaken along the lineL-G in Fig. l.' j.

Fig. 'l is a section taken along the line 'z 7 ln Fig. 5.

Fig. 8 is a section taken along the line 8-8 in Fig. 1.

Similar numbers-of reference refer to similar.

rock shaft 16 provided with a reduced portion 17 which passes through the end 12. The portion 17 carries on its outer end a wiper arm' 18 to whose swinging endv is hingedly attached a v'the valve 38 or its equivalent which causes a wiper element 19'. it is ldesirable'-tovllilnit the hinging movement of the element 19 by means of a link 20, or in any otherconvenient manner such as -extending thev arm '18* past the pivot i Vpoint 21 and utilizing 'the' extended4 arm' as a 6G st0p On the reduced portion 'llbetweengthe end pose it is to urge the wiper 19'i'l"lvvl'i'rd the glass 23 of the-motormanswindow'.

Within the shaft 16 .ls1`a'holel24 into which I projects a rock shaft 25vofan air motor' 26, pref' erably of the type 'employing-a compressed -lair and which is now in common use. Thel motor 2 6 is carried by a Suitable bl'aikef'. 3 7 'which is 70'- n secured to the post 28.

The rock shaft lrcarries'onl itsv outer end a f y 10 by. means of the screws 'hand lever 29 -and a lug 30, which latter is capable of engaging the.latch31 and holding the wiper 19 in an inoperativel position (as shown in Fig. 1) or be disengaged therefrom by first vpushing the leven 29 toward the post 10 y which will lift the lug 30 out of the recess 32 in the latch 31 and permit the shaft 16 to slide ,so outwardly toward the` operator, carrying with it the wiper 19 and permitting it to come in to engagement with vtl'ie 'glass 23 (as shown .in

Fig..2)`.

The hole 24 is provided with keyways 83 the 8- cuter` ends of which are widened to form the angular faces 34' which expedite the entrance of the pin 35 into the keyways 33. .The pin 35 is secured in the rock shaft 25 and projects through each end thereof. v

On the outside ofthe post 10is mounted a guard 36 whose purpose itis to protect the wip ing element 19 andthe arm 18 from becoming fouled with the trolley rope which usually hangs in front of the motormans window. Air is supplied to the motor 26 by a source of power through the tubing 37 under the control of the valve 38. 'I'he operation of the device is as follows: 91s-,` suming that the window is in a closed position and it is desired to operate the wiper the motori man merely pushes the lever 29 forwardly a slight distance and then rotates it leaving the lug 30 out of its latched position and permitting the wiper 19 to engage the glass 23. He then opens rocking movement to take place` at the shaft 25, and since the pin 35 is within the keyways'33 this rocking motion is imparted to the shaft 16.

1f the operator merely desires tostop the win no dow wiper all that he has to do is toclose the valve 38, but should he desire to open the window he rst pushes the lever 29 forwardly and rotates it toward the position shown' in Fig. l in which the wiper 19 is not only disengaged from the glass 23 but is also stored away within the guard 36. 'Ihe purpose of widening the ends of the keyways 33 is of course to expedite the entrance of the pin 35 thereinto, aswpreyiously suggested.

The purpose of the stop 13 is to prevent an i excessive upward movement of the arm 18 at any timethat is, it cannot travel higher than the uppermost position for wiping the glass either when touching the glass or when in an outward position-that is,outside of the frame 10.

The purpose of the stop 14 is to prevent an excessive downward movement of the arm 18 when the wiper 19 is contacting the glass 23,`

although permitting the arm 18 to move to a vertical position (as shown in Fig. l), whenthe wiper is moved away from the glass.

I claim:

1. A wiperfor Streetcar Windows of the drop type comprising a prime mover adapted to be mounted behind the upright portion of a car window frame and having a horizontal shaft projecting into said frame, a rock shaft slidably and rockably mounted Within said frame and extending outside of the frame and having e, jaw clutch on its inner end for engaging a clutch part on the outer end of said drive shaft, a spring for slidably urging said rock shaft in` Wardly to a vclutch engaging position, a latch for holding said rock shaft outwardly in 1 clutch disengaging position, a handle on said rock shaft for moving said rock shaft manually, an arm on the outer end of said rock shaft, a wiper blade pivotally attached to the swinging end of said arm and being in contact with the window glass when the rock shaft is in its clutch engaging position, and out of contact with the glass a sufficient distance to clear the frame when the rock shaft is latched in its clutch disengaging position, a stop on said frame for preventing excessive upward movement of said arm at all times, and a second stop on said framefor limiting the downward movement of said blade while it is contacting said glass, but permitting excessivedownward movement of the blade when the blade is moved away from the t glass.

2. A wiper such as described in claim l, in combination with means for limiting the relative movement between the wiper blade and the arm to which it is attached.

P ST. JOHN TON.

MIU) 

